Defines in src/sd-sdl

• DEFAULT_SOUND_BITS src/sd-sdl/sound.h:34
• DEFAULT_SOUND_FREQ src/sd-sdl/sound.h:35
• DEFAULT_SOUND_MAXB src/sd-sdl/sound.h:32
• DEFAULT_SOUND_MINB src/sd-sdl/sound.h:33
• HAVE_STEREO_SUPPORT src/sd-sdl/sound.h:36
• SOUND16_BASE_VAL src/sd-sdl/sound.h:29
• SOUND8_BASE_VAL src/sd-sdl/sound.h:30